#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
int main()
{
    int n;
    cin >> n;
    for(int i = 0; i<n; i++)
    {
        for(int j = 0; j<n; j++)
        {
            if(i%2 ==0)
                cout<<"* ";
            else
                cout<<" *";
        }
        cout<<endl;
    }
}